The allegations were leveled by U.S. officials late last week. Arms control experts worry that norms against nuclear testing ...

The United States on Friday accused China of carrying out a secret nuclear test in 2020 as the Trump administration calls for ...

Work is progressing fast just outside Kemmerer at TerraPower’s first-of-its-kind nuclear power project. Cowboy State Daily ...

It remains to be seen whether the three big nuclear powers are headed into a new arms race, or whether President Trump is trying to spur negotiations on a new accord now that a last Cold War treaty ...

If nothing replaces the New START nuclear arms treaty, security analysts see a more dangerous environment with a higher risk ...

A strong 5.2 quake rattling the ground near Iran’s Bushehr nuclear plant would be alarming in any week. Coming just as Washington and Tehran edge toward a direct clash over nuclear sites, it has ...

The US accused China Wednesday of conducting at least one secret nuclear test as Washington continued its push for a new arms ...

The US accused China of secret nuclear tests, banned under international agreement, that were building toward tests of larger ...

The New Strategic Arms Reduction Treaty expired recently --- freeing the US and Russia from all major nuclear restraints.

The Pentagon is quietly transporting a next-generation nuclear reactor across the American West, routing it from Southern ...

The United States flew a reactor in space in the 1960s and has studied nuclear thermal propulsion for decades. Fuel is not the primary limitation either; the enriched uranium supply chain is ...